package main

import "fmt"

func main() {
	var s1 = []string{"1", "2"}
	s2 := s1
	s3 := make([]string, len(s1))
	copy(s3, s1)
	s3[0] = "1000"
	s2[0] = "100"
	fmt.Println(s1)
	fmt.Println(s2)
	fmt.Println(s3)
}
